package com.dlz.systemshop.config;


import com.dlz.systemshop.pojo.APIResponse;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;


// 统一接口返回
@Slf4j
@RestControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice {

    @Autowired
    private ObjectMapper mapper;


    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {

        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
        if (body instanceof String) {
            try {
                return mapper.writeValueAsString(APIResponse.success(body));
            } catch (JsonProcessingException e) {
                throw new RuntimeException(e);
            }

        } else if (body instanceof APIResponse<?>) {
            return body;
        }
        // 默认放回成功
        return APIResponse.success(body);
    }
}
